This product contains a preservative called Methylisothiazolinone. This compound is fairly safe when included in wash-off products but it's a strong sensitizer when used in stay-on products like lotions. After a few years of using Assos Chamois gell I acquired a very severe hypersensitivity to this compound. My symptoms were not only rashes in my crotch but severe general attacks of dermatitis so bad that they had to be treated with systemic corticosteriods.

Before you try Assos chamois gell you should read about Methylisothiazolinone here:

http://en.wikipedia.org/wiki/Methylisothiazolinone

Also google Kathon sensitizing. You will get a bunch of hits like these: